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Celestron - NexStar 5 SE with StarBright XLT Coatings
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$ 799.00
Reg.$ 1478.95
SAVE $ 679.95 | |
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Click here for recommended accessories |
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 Featuring high-quality Schmidt-Cassegrain optics, the NexStar 5 SE is an ideal telescope
for observing and photographing the wonders of space. With a total weight of 28 lbs including the
tripod, the ultra portable 5 SE features a precision optical system with 1,250 mm focal length
(f/10) standard with our premium StarBright XLT coatings and offers 56% more light gathering
power than a 4” model. The 5 SE includes a camera control feature that allows you to remotely
take a series of timed exposures using your digital SLR camera. Plus the tripod featuring a
built-in wedge helps make short-exposure astrophotography a heavenly experience. The
NexStar 5 SE has all the same features as Celestron’s most advanced computerized GoTo telescopes,
including our revolutionary SkyAlign™ alignment technology, a sky tour feature, a database of
nearly 40,000 celestial objects and easy to use hand control. Plug the optional CN-16 GPS
Accessory into NexStar’s auxiliary port and download data from orbiting GPS satellites for truly
quick and easy alignments. The universe may be full of mysteries, but using the NexStar 5 SE
isn’t one of them. In the tradition of Celestron’s famous orange optical tubes, the new
NexStar SE Family combines the classic heritage of the original orange tube telescopes with
state-of-the-art features including a fully computerized operating system, flash upgradeable hand
control, our superior StarBright XLT coatings, our revolutionary SkyAlign™ telescope alignment
software and much more. Whether you are a seasoned astronomer looking for
a portable scope with advanced features, or just starting your astronomy adventure and looking for
an easy way to enjoy the night sky, a NexStar SE will help you take a closer look.
Every NexStar SE includes a version of The Sky® software Level 1 Planetarium software for
exploring the Universe on your PC and printing out custom star charts of the sky. In addition,
you receive our NexRemote software that allows you to operate your telescope via your PC.
Software package valued at over $100 included free with your NexStar SE!
Celestron has brought its renowned StarBright technology to an even higher level of light
transmission with the introduction of our new optional StarBright XLT High Performance Optical
Coating System.
StarBright XLT Optical System Design - You’ll See The Light.
One of the most important factors in the evaluation of a Schmidt-Cassegrain telescope’s optical
system performance is its transmission - the percentage of incoming light that reaches the focal
plane. The design of the XLT System accomplishes two crucial objectives: Develop a coating system
that is optimized for visual use and for CCD/Photographic imaging.
The StarBright XLT System - What Makes It Different Makes It Better
There are three major components that make up our StarBright XLT high transmission optical system
design:
1. Unique enhanced multi-layer mirror coatings
Our mirror coatings are made from precise layers of Aluminum (Al), SiO2 (quartz), TiO2 (Titanium
Dioxide), and Si02. Reflectivity is fairly flat across the spectrum, optimizing it for both CCD
imaging and visual use. Click here to see a plot of the reflectivity of XLT’s Mirror Coatings.
2. Multi-layer anti-reflective coatings
Made from precise layers of MgF2 (Magnesium Fluoride), and HfO2 (Hafnium Dioxide) A rare element
costing nearly $2000 per kilogram, Hafnium gives us a wider band pass than Titanium, used in
competing coatings. Click here to see a plot of XLT’s corrector transmission.
3. High Transmission Water White glass
Celestron Schmidt-Cassegrain optical systems with optional StarBright XLT coatings use Water
White glass instead of Soda Lime glass for the corrector lens. Water White glass transmits about
90.5% without anti-reflective coatings. That is 3.5% better transmission than uncoated Soda Lime
glass. When Water White glass is used in conjunction with StarBright XLT’s anti-reflective
coatings, the average transmission reaches 97.4% - an 8% improvement! Click here to see a plot of
water white glass versus soda lime.*
These three components of our StarBright XLT coatings result in one of the finest coatings
available. The peak transmission for the systems is 89% at 520 nm. The overall system
transmission is 83.5% averaged over the spectrum from 400 to 750 nm.
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